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利用光学显微镜、扫描及透射电镜对热轧态下的耐火钢的显微组织进行了观察和研究,结果表明:耐火钢的显微组织为等轴状铁素体、粒状贝氏体和粒状组织的混合产物。同时分析了这种耐火钢的组织与性能之间的关系。

The microstructure of a fireresistant steel after hotrolling was studied by means of OM,SEM and TEM. It is show that the microstructure of the hot rolled steel consists of equiaxed ferrite ,granular bainite and granular structure. In addition,the relationship between microstructure and properties of the fireresistant steel was analyzed.

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